Barron's E-Z Anatomy and Physiology Chapter 15 review
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| The heart is enclosed within an area of the thorax known as the: | mediastinum
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| The double sac membrane that covers the heart is the: | pericardium
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| The heart has three layers of tissue; the middle and thickest layer is called the: | myocardium
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| The layer of the heart tissue lining the heart chambers and covering valve tissue is the: | endocardium
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| The heart chambers are separated longitudinally by a body of tissue known as the: | cardiac septum
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| The blood receiving chambers of the heart are the: | atria
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| The pumping chambers of the heart are the: | ventricles
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| Blood returns to the heart from the lungs by means of the: | pulmonary veins
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| The large artery carrying blood to the body from the left ventricle of the heart is the: | aorta
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| Those blood vessels that carry blood away from the heart are: | arteries
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| Those blood vessels that carry blood toward the heart are: | veins
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| On the right side of the heart, the valve between the right atrium and right ventricle is the: | tricuspid valve
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| The valves leading to the pulmonary trunk and aorta are both referred to as the: | semilunar valves
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| Arteries supplying blood to the tissue of the heart are the: | coronary arteries
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| A blockage in vessels supplying heart muscle may cause a(n): | myocardial infarction
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| Because the sinoatrial node sets the pace for the autorhythmic cardiac muscle activity of the heart, it is commonly known as the: | pacemaker
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| The specialized cardiac muscle fibers in the interventricular septum, which distribute nerve impulses to tissues of the ventricles, are the: | Purkinje fibers
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| The QRS wave of an EKG represents the electrical activity of: | ventricles contracting
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| The autorhythmic activity of the heart can be modified by a branch of the nervous system known as the: | autonomic nervous system
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| Heart contraction is known by the alternate term of: | systole
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| Relaxation periods of the heart when contractions are not occurring are known as: | diastole
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| The heart normally beats each minute approximately: | 70-75 times
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| Unusual heart sounds, such as those emitted by poorly functioning valves, are called: | heart murmurs
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| The smallest vessels, which carry blood to the cells of the tissues are the: | capillaries
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| An artery's lumen may be narrowed by: | vasoconstriction
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| Dilated veins with pooled blood cause a condition known as: | varicose veins
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| The pressure of the blood can be measured by an instrument known as a(n): | sphygmomanometer
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| A typical blood pressure reading contains two numbers of which the first number is the systolic pressure and the second number is the: | diastolic pressure
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| A rapid pulse reflects a rapid heart rate and a condition called: | tachycardia
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| A slow pulse reflects a slow heart rate and a condition called: | bradycardia
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| The regulatory center of the brain that maintains the flow of blood is a cluster of sympathetic neurons known as the: | vasomotor center
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| Insufficient oxygen and nutrients delivered to the body cells may induce a condition known as: | shock
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| The only artery of the body that carries oxygen-poor blood is the: | pulmonary artery
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| The only vein of the body that carries oxygen-rich blood is the: | pulmonary vein
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| The pattern of blood vessels within the brain is known as the: | circle of willis
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